Without delay, let's solve this. We've got 63 and we will be multiplying it by 99, that is, adding 63 to itself 99 times.
Step 1: 0 + 63 = 63
Step 2: 63 + 63 = 126
Step 3: 126 + 63 = 189
Step 4: 189 + 63 = 252
Step 5: 252 + 63 = 315
Step 6: 315 + 63 = 378
Step 7: 378 + 63 = 441
Step 8: 441 + 63 = 504
Step 9: 504 + 63 = 567
Step 10: 567 + 63 = 630
Step 11: 630 + 63 = 693
Step 12: 693 + 63 = 756
Step 13: 756 + 63 = 819
Step 14: 819 + 63 = 882
Step 15: 882 + 63 = 945
Step 16: 945 + 63 = 1008
Step 17: 1008 + 63 = 1071
Step 18: 1071 + 63 = 1134
Step 19: 1134 + 63 = 1197
Step 20: 1197 + 63 = 1260
Step 21: 1260 + 63 = 1323
Step 22: 1323 + 63 = 1386
Step 23: 1386 + 63 = 1449
Step 24: 1449 + 63 = 1512
Step 25: 1512 + 63 = 1575
Step 26: 1575 + 63 = 1638
Step 27: 1638 + 63 = 1701
Step 28: 1701 + 63 = 1764
Step 29: 1764 + 63 = 1827
Step 30: 1827 + 63 = 1890
Step 31: 1890 + 63 = 1953
Step 32: 1953 + 63 = 2016
Step 33: 2016 + 63 = 2079
Step 34: 2079 + 63 = 2142
Step 35: 2142 + 63 = 2205
Step 36: 2205 + 63 = 2268
Step 37: 2268 + 63 = 2331
Step 38: 2331 + 63 = 2394
Step 39: 2394 + 63 = 2457
Step 40: 2457 + 63 = 2520
Step 41: 2520 + 63 = 2583
Step 42: 2583 + 63 = 2646
Step 43: 2646 + 63 = 2709
Step 44: 2709 + 63 = 2772
Step 45: 2772 + 63 = 2835
Step 46: 2835 + 63 = 2898
Step 47: 2898 + 63 = 2961
Step 48: 2961 + 63 = 3024
Step 49: 3024 + 63 = 3087
Step 50: 3087 + 63 = 3150
Step 51: 3150 + 63 = 3213
Step 52: 3213 + 63 = 3276
Step 53: 3276 + 63 = 3339
Step 54: 3339 + 63 = 3402
Step 55: 3402 + 63 = 3465
Step 56: 3465 + 63 = 3528
Step 57: 3528 + 63 = 3591
Step 58: 3591 + 63 = 3654
Step 59: 3654 + 63 = 3717
Step 60: 3717 + 63 = 3780
Step 61: 3780 + 63 = 3843
Step 62: 3843 + 63 = 3906
Step 63: 3906 + 63 = 3969
Step 64: 3969 + 63 = 4032
Step 65: 4032 + 63 = 4095
Step 66: 4095 + 63 = 4158
Step 67: 4158 + 63 = 4221
Step 68: 4221 + 63 = 4284
Step 69: 4284 + 63 = 4347
Step 70: 4347 + 63 = 4410
Step 71: 4410 + 63 = 4473
Step 72: 4473 + 63 = 4536
Step 73: 4536 + 63 = 4599
Step 74: 4599 + 63 = 4662
Step 75: 4662 + 63 = 4725
Step 76: 4725 + 63 = 4788
Step 77: 4788 + 63 = 4851
Step 78: 4851 + 63 = 4914
Step 79: 4914 + 63 = 4977
Step 80: 4977 + 63 = 5040
Step 81: 5040 + 63 = 5103
Step 82: 5103 + 63 = 5166
Step 83: 5166 + 63 = 5229
Step 84: 5229 + 63 = 5292
Step 85: 5292 + 63 = 5355
Step 86: 5355 + 63 = 5418
Step 87: 5418 + 63 = 5481
Step 88: 5481 + 63 = 5544
Step 89: 5544 + 63 = 5607
Step 90: 5607 + 63 = 5670
Step 91: 5670 + 63 = 5733
Step 92: 5733 + 63 = 5796
Step 93: 5796 + 63 = 5859
Step 94: 5859 + 63 = 5922
Step 95: 5922 + 63 = 5985
Step 96: 5985 + 63 = 6048
Step 97: 6048 + 63 = 6111
Step 98: 6111 + 63 = 6174
Step 99: 6174 + 63 = 6237

So, 63*99 = 6237